Tank lining



Oct. 8, 1929. Y G, LUX 1,730,856

TANK LINI NG Filed June 7, 1926 l 9 [3 Ga/ob Lux,

ATT'ORNEY Patented Oct. 8, 1929 UNITED STATES rares-r ermee GOTTLOB LUX, CF BERLINCHARLOTTENBURG,GERMANY, .ASSIGNOR TO WESTING- HOUSE ELECTRIC & MANUFACTURING COMPANY, Ay CORPORATION OF PENNSYL- VAN IA TANK LINING Application flied June 7, 192e, serial No. 1112045, and'in Germany my 20', 19'25.

My invention. relates to fluid-immersed electrical apparatus and particularly to insulating linings for the containers thereof.

One object of mty invention is to provide sectional linings for the containers of luidimmersed electrical apparatus.

Another object of my invention is to provide linings for the tanks of fluid-immersed electrical apparatus that shall permit circulation of the fluid against the tank Walls.

Another object of my invention is to provide linings for the containers of lluidimmersed electrical apparatus that shall insulate the electrical apparatus from the Walls of the containers and also permit a circulation of the immersing fluid against the relatively cool Walls of the containers.

In electrical apparatus such as transformers, circuit interrupters and the like, it is customary practice to provide linings for the metal tanks that serve to insulate the .electrical apparatus from such metal tanks. The insulating materials commonly used for the linings are relatively poor conductors of heat. Since the capacity of electrical apparatus of many types is determined by their ability to radiate heat through the insulating fluid and the tank lining, it is necessary to provide the apparatus with a large radiating surface.

I propose to secure more efficient heat radiation by providing a sectional tank lining that shall permit the insulating fluid to circulate therethrough an d come into contact With the cooler tank Wall, and, at the same time shall overlap the sections in order thatsuch as eilt contained in a tank 5 that' is protected from tlle' curient-carrying' electrical parts of the device by an insulating'lining 6.

lVhile I have' shown my invention as applied toa circuit interrupter l, it is to be understood thaty the invention is equally applicable' to lluidlimmerse'd transformers, reactors and the like.

rllhe stationaryA contact'. members 2v andthe bridging member 3 may be ot any preferred construction, as they constitute no partV of the presentinvention, exceptin so far as they are necessary to complete the several combinations hereinafter described and claimed.

The tank lining G comprises a plurality of annular bands 7 ofmicart'a or other suitable insulating material. Each of the bands 7 has the shape of'a segmentof acone in order that itsupper edge may be secu-red, by insulating rivets 8, to insulating supports 9 mounted in thetank 5.

f By reason ofl the' taper ofthe several bands 7, a plurality of openingsll are formed between adjaceut bands, through which the insulating-fluid 4 may circulate. The bands 7 are secured to supports 9v in overlapping relation in order that an electrical insulating barrier' shall existbetiveen the current-carrying contact members 2 andthe bridging members andrthe metallic Wall ofl the tank.'

Then current is traversing the circuit interruptelj l and, paiticularly, when ran arc is drawn therein, heat is generated which must be radiated therefrom. Accordingly, convection currents are set up in the insulating fluid fl which tend to move upwardly, outwardly, and vdownwardly along the tank Walls Where they engage the tank lining 6. Such currents flow through the openings 11 and come directly into engagement with the metallic wall of the tank 5. By reason of the direct engagementofthelluidl ywith the tank 5 'it is'possible to radiate the heat generated Within the circuit interrupter 1 Without the time lag experienced, and the large radiating Vpose of a plurality of bands 12 that are also annular in form but of uniform diameter. The bands 12 are disposed in overlapping relation upon the supports 9 in an alternate internal and external arrangement so that openings 13 are provided between the adjacent bands 12. The operation of this form of myV invention is similar to that described in connection With the modilication shown in Fig. 1.

It will thus be seenl that I have provided a lining for the containers of immersed eleotrical apparatus that permits a circulation of the cooling medium directly in contact With the metallic Wall of the container and, at the same time, provides an electrical insulating barrier between suc-h apparatus and the container wall. Y

It is to be understood that such changes in the shape, form and arrangement of the com.- ponent parts of my invention may be made as shall be Within the scope of the appended claims.

I claim as my invention:

1. In an electrical apparatus, the combination With a tank, an electrical device mounted in the tank, and insulatingluid surrounding the electrical device, of a lining for the tank having a plurality of overlapping conical sections of insulating material spaced apart to provide openings to permit circulation of the insulating fluid therebetween Without materially reducing the insulating qualities thereof.

2. In an electrical apparatus, the combination With a tank. an electrical device mounted in the tank, and insulating fluid surrounding the electrical device, of an insulating lining for the tank having a plurality of overlappingtapered sections spaced apart to provide openings throughout its entire length to permit circulation of the insulating iuid into engagement With the tank Wall and providing an insulating'barrier between the electrical device and the tank Wall.

3. In an electrical apparatus, the combination with a tank, an electrical device mounted in the tank, and insulating fluid surrounding the electrical device, of a lining for the tank having a plurality of overlapping insulating sections of conical shape spaced apart to pro,

vide a plurality of openings throughout its entire length to permit circulation of the insulating iiuid into engagement With the tank Wall Without materially shortening the arc path thereto.

In testimony whereof, I have hereunto subscribed my name this 7 th day of May, 1926. GOTTLQB LUX. 

